1,2-Dihydro-3-phenoxymethylpyrido{8 3,4-e{9 -as-triazine hydrochloride and 3-phenoxymethylpyrido{8 3,4-e{9 -as-triazine

ABSTRACT

The titled compounds are effective antifungal agents adapted to be combined in pharmaceutical forms for use in the eradication of fungus infection.

I United States Patent 1 1 [111 3,882,111

Wright et al. May 6, 1975 1,2-DIHYDRO-3- [51] Int. Cl C07d 57/34 PHENOXYMETHYLPYRIDO[3,4.E].As. [58] Field of Search 260/248 AS TRIAZINE HYDROCHLORIDE AND 3-PHENOXYMETHYLPYRlDO[3,4-E]-AS- REfel'eIICES Ciled TRIAZINE UNITED STATES PATENTS [75] Inventors: George C. Wright; Allan V. Bayless; 3,597,427 8/1971 Lewis et al 260/248 Joseph E. Gray, all of Norwich, N.Y.

Morton-Norwich Products, Inc., Norwich, N.Y.

Filed: June 6, 1973 Appl. No.: 367,497

Assignee:

US. Cl. 260/248 AS; 424/249 Primary Examiner.lohn M. Ford Attorney, Agent, or Firm--Anthony J. Franze s7 1 ABSTRACT 4 Claims, No Drawings 1 l,Z-DIHYDRO-S-PHENOXYMETHYLPYRIDO[3,4- E]-AS-TRIAZINE HYDROCHLORIDE AND 3-PHENOXYMETHYLPYRlDO[3,4-E]-AS- TRIAZINE This invention is concerned with the chemical compounds l,2-dihydro-3-phenoxymethylpyrido{ 3,4-e]-astriazine hydrochloride and 3- phenoxymethylpyridol3,4-e]-as-triazine. These compounds are effective antifungal agents. They are readily prepared in accordance with the following examples:

EXAMPLE 1 l ,2-Dihydro-3-pher1oxymethylpyrido[3 ,4-e l-astriazine Hydrochloride A. Ethyl 3-(3-nitro-4-pyridyl)carbazate Hydrochloride To a solution of 91 g (0.57 mole) of 4-chloro-3- nitropyridine in 600 ml of phenol was added 62 g (0.60 mole) of ethyl carbazate at 4050, using mechanical stirring. The reaction was exothermic over ca. 5 min, with a temperature rise to 72. The reaction solution was heated on the steam bath for 1% hr, cooled to 35-40, and added to 3.2 Iof anhydrous ether. After standing at room temperature for ca. min, the supernatant solution was decanted, and the resultant amorphous solid was washed twice with anhydrous ether. The solid was treated with 500 ml of isopropanol, heating on the steam bath with trituration, affording a light yellow, crystalline solid. Upon cooling in an ice bath for ca. 10 min, the intitial product was collected, washed well with isopropanol and ether, and dried in a vacuum dessicator overnight. Yield: 55 g (37%). The product was recrystallized from 700 ml of ethanol, m.p. 203-204. Yield: 40 g.

plus catalyst was washed with three 10 ml portions of isopropanol, ether and dried, m.p. 2 l 7-2l 8 decompn. Yield: 17 g (92%).

This procedure was repeated once more to give a total of 34 g of the product plus catalyst. The crude product, 34 g, was recrystallized from 1.7 l of methano1:H O (19:1), washed with 170 ml of methanol, 300 ml of ether and dried, m.p. 223225 decompn.

0 Yield: 23 g (61%).

Anal. Calcd. for C,H,,N,.HC1: C, 37.39; H,

5. Found: C, 37.12; H, 5

1,Z-Dihydro-3-phenoxymethylpyrido[ 3,4-e]astriazine Hydrochloride The residue was dissolved in 250 ml of abs. MeOH and 50 ml of HCl-saturated MeOH was added. The reaction was refluxed overnight, cooled to room temperature, and a gray material was filtered. Crystals formed in the filtrate and were filtered. Yield: 23 g (3 8%), m.p. l92-l95 (dec.).

Anal. Calcd. for C,,H,.,N.O..HC1: C. 36.58; 2

H, 4. 2; N 21.33. Found: C, 36.70; H, 4. 2; N, 21.65

B. 4-H ydrazino-3-nitr0pyridine Hydrochloride Anal. Calcd. for C,;,H ,N O.HCl: C, 56.42; Found: C, 56.43,

EXAMPLE ll 3-Phenoxymethylpyrido[ 3 ,4-e]-as-triazir1e To a solution of 15 g of the compound of Example 1 in 150 ml of H 0 was added 45 g of MnO The reaction was stirred for 54 hr and then filtered. The residue was washed with m1 of EtOH and then with A liter of HCCI The HCCl layer was washed with 200 ml of water, filtered through anhyd. MgSO and flashevaporated to dryness to yield an orange solid. This was recrystallized from 400 ml of abs. MeOH to give 10.5 g, (81%), m.p. ll5l 19.

Anal. Calcd. for C,H,N O .HCI: C, 31.51;

Found: C, 31.60;

H, 3.70; N, 2940; C1, 1860 H .80; N, 29.66; C1, 1850 C. 3-Amino-4-hydrazinopyridine Hydrochloride A 22 g (0.12 mole) portion of B. was slurried in 170 ml of ethanol, treated with 1.4 g of 5% Pd/C (50% moisture) and subjected to hydrogenation at 50 psig. The hydrogen uptake was 30 1b. in 4 hr. The reduction mixture was cooled for 2 hr and filtered. The product Anal. Calcd. for C, -,H,,,N O: C, 65.53; H .23, N, 2

Found: C, 65.60; H .95; N, 23.60.

The compounds of this invention are potent antifun gal agents. They are capable in small concentrations of 3 4 inhibiting the growth of pathogenic fungi such as Canmonly used excipients with which there is no incompatdida albic'ans and Microsporum Cam's. Such capabilities ibility.

are represented in the table herebelow which reflects results secured in the commonly used in vitro antifungal test employing Sabouraud's dextrose agar as the l. A compound selected from the group consisting of What is claimed is:

medium supportive of fungal growth and measuring the y p y y py l ii amount of inhibition of such growth in millimeters over hydrochloride and B-phenoxymethylpyridoi 3,4-el-asa period of 3 days: triazinei Diameter of Zone of Inhibition in mm at Days *Conc. in C dlhl CLIIH M, cunix Compound meg/ml 2 4 6 8 4 6 Example l 1480 26 25 25 24 ()0 59 59 Example ll 980 24 1s 1s 45 40 35 The diluent carrier for the compound in this test is 50% ethanol which exhibits no anlii'ungnl activity.

A noteworthy characteristic of the compounds of this 2. The compound l,2-dihydro-3 invention is their lack of irritation to the skin. When apphenoxymethylpyridol 3,4-e]'as-triazine hydrochloplied daily in the form of a suspension at concentraride. tions up to 4% in a vehicle of aqueous methyl cellulose, 3. The compound 3phenoxymethylpyrido{ 3,4-el-asno skin irritation was observed over a period of three triazine. days. 4. The method of preparing 3- For convenience in administration the compounds of phenoxymethylpyridol 3,4e]-as-triazine which consists this invention can be compounded in various pharmain oxidizing l 2-dihydro-3-phenoxymethylpyrido[3,4- ceutical forms such as ungents, solutions, suspension, e]as-triazine hydrochloride with manganese dioxide. powders, and sprays using readily available and com- 

1. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,2DIHYDRO-3-PHENOXYMETHYLPYRIDO(3,4-E)-AS-TRIAZINE HYDROCHLORIDE AND 3-PHENOXYMETHYLPYRIDO(3,4-E)-AS-TRIAZINE.
 2. The compound 1,2-dihydro-3-phenoxymethylpyrido(3,4-e)-as-triazine hydrochloride.
 3. The compound 3-phenoxymethylpyrido(3,4-e)-as-triazine.
 4. The method of preparing 3-phenoxymethylpyrido(3,4-e) -as-triazine which consists in oxidizing 1,2-dihydro-3-phenoxymethylpyrido(3,4-e)-as-triazine hydrochloride with manganese dioxide. 